New idea

Three days before the match, we inject scorpion venom into the wrestlers, allowing blisters to form all over their body (I'm assuming that's what scorpion venom does). Only problem is we may not be able to get a syringe past their muscles, so it may be necessary to soak a machete in scorpion venom and slash them across the chest beforehand.

Maybe we should throw other random poisonous creatures into the match as well. If we only throw snakes in, people are going to think your 'snakeist' and that could end up becoming a major lawsuit. Why not throw some snakes in, as well as some spiders. And who needs anti-venom, part of the fun is trying to dodge the little guys.